As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME EVENT ISOLATED TO PACK 1 ON DESCENT THROUGH 6000' ( PACKS A320 WITH MOD 31283/MP P7125 (FWC H2-F1 STND) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) - FAULT CAUTIONS ASSOCIATED WITH OPERATIVE SIDE NOT DISPLAYED )-PERFORMED PACK 1 BURN OUT IAW TSM 05-50-00. PACK 1 HS NO ODOR. ACTIVATED PACK 1. THIS CLEARS DMI 2553866-1. MOC NOTIFIED. TRAX UPDATED.